Title :
A Wide-Beam Circularly Polarized Asymmetric-Microstrip Antenna
Author :
Nasimuddin ; Anjani, Y.S. ; Alphones, A.
Author_Institution :
Inst. for Infocomm Res., A*STAR, Singapore, Singapore
Abstract :
A wide-beam circularly polarized (CP) asymmetric microstrip antenna with four unequal circular-patches is proposed for global navigation satellite systems. Four unequal circular-patches are integrated symmetrically onto corners of a square microstrip radiator for CP radiation with wide-beamwidth. The measured 3-dB axial ratio (AR) bandwidth of the proposed antenna is 24.0 MHz (1.568-1.592 GHz) with a 3-dB AR beamwidth of around 180° across the bandwidth and a 10-dB return loss bandwidth is 56.0 MHz (1.556-1.612 GHz) with a gain of more than 5.0 dBic. The overall size of the antenna is 0.373λo×0.373λo×0.016λo at 1.6 GHz.
Keywords :
Global Positioning System; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; satellite antennas; CP radiation; axial ratio; bandwidth 24.0 MHz; bandwidth 56.0 MHz; frequency 1.6 GHz; global navigation satellite systems; loss 10 dB; square microstrip radiator; unequal circular patch; wide beam circularly polarized asymmetric microstrip antenna; Antenna measurements; Bandwidth; Global Positioning System; Microstrip; Microstrip antennas; Asymmetric-microstrip antenna; CP antenna; GNSS; circular polarization; circular polarization (CP); global navigation satellite systems (GNSS); wide-beamwidth;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2438397
